Alpena Limestone
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| Alpena Formation | |
|---|---|
| Stratigraphic range: Middle Devonian | |
| Type | Formation |
| Unit of | Traverse Group |
| Sub-units | Four Mile Dam Member and Newton Creek Member |
| Underlies | Thunder Bay Limestone |
| Overlies | Long Lake Limestone |
| Location | |
| Region | Michigan |
| Country | United States |
The Alpena Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Lua error in mw.title.lua at line 392: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal').
References
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